>>>>I opened a text doc with Notepad, entered the above characters (using Alt-197 and so on). But when I try to save the text file, I get message that the characters in Unicode format will be lost. I believe the this function that Viv translated from VFP has to work on plain text. So maybe your colleague is right. How do you create a plain text document with the characters as above?
>>>
>>>This is what my colleague told me:
>>>
>>>Try encrypting a string in VFP using the Cipher50.fll with a key that is Chr(191) + chr(130) + chr(189) + chr(150)
>>>You'll find that the C# result is not a match for the VFP result.
>>>
>>>If you encrypt with regular low ascii, it works beautifully, though. Unfortunately, the way we encrypt the license files takes the client number, and encrypts it - then uses that result to encrypt the file. The chr() vaues I gave you above are the results of encrypting the client number 8151.
>>>
>>>Do you or Viv know what needs to be adjusted in that code to be able to work with high ascii chars as well?
>>
>>I don't use Cipher50.fll to encrypt the string in VFP. I use a function created by Sergey B. So maybe this is why your colleague is not getting the results he/you want.
>
>It's possible that Sergey's function didn't work with high ascii values either. Can you just test it with high ascii values?

I tested your string with Sergey's function and it works in VFP.